A method of distributing oil to a component within a gas turbine engine includes directing a first oil flow from an oil source to an engine component and back to the oil source, directing a second oil flow from the oil source to a generator driven by the engine and back to the oil source, monitoring a parameter of the second oil flow downstream of the generator and upstream of the oil source, detecting a contaminant in the second oil flow based on the parameter, and reducing the second oil flow to the generator when the contaminant is detected without reducing the first oil flow to the engine component. A shared oil system for a component of a gas turbine engine and a generator driven by the gas turbine engine is also discussed.

Provided is a life evaluating device that evaluates the life of a lubricant in a machine including a motor and a transmission mechanism that is lubricated by the lubricant and transmits power of the motor to a movable unit. The life evaluating device includes a motor-heat-value calculating unit that calculates a motor heat value on the basis of a current value of the motor, a frictional-heat-value calculating unit that calculates a frictional heat value in the transmission mechanism on the basis of rotating speed of the motor and a coefficient of friction of the transmission mechanism, a lubricant-temperature estimating unit that estimates temperature of the lubricant on the basis of the calculated frictional heat value and the calculated motor heat value, and a life estimating unit that estimates the life of the lubricant on the basis of the estimated temperature of the lubricant and information concerning impurities in the lubricant.

Provided is a life evaluating device that evaluates the life of a lubricant in a machine including a motor and a transmission mechanism that is lubricated by the lubricant and transmits power of the motor to a movable unit. The life evaluating device includes a motor-heat-value calculating unit that calculates a motor heat value on the basis of a current value of the motor, a frictional-heat-value calculating unit that calculates a frictional heat value in the transmission mechanism on the basis of rotating speed of the motor and a coefficient of friction of the transmission mechanism, a lubricant-temperature estimating unit that estimates temperature of the lubricant on the basis of the calculated frictional heat value and the calculated motor heat value, and a life estimating unit that estimates the life of the lubricant on the basis of the estimated temperature of the lubricant and information concerning impurities in the lubricant.

A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. The capacity of the reservoir changes in accordance with deformation of the piezoelectric body so as to discharge lubricating oil from the oil feeding unit. The control apparatus includes N driving circuits 71a to 71n configured to apply voltages to the piezoelectric body (where N is an integer equal to or greater than two). The N driving circuits 71a to 71n are connected in parallel to the piezoelectric body. During oil feeding, the control apparatus uses a predetermined number of the driving circuits selected from the N driving circuits. The predetermined number is smaller than N.

A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. The capacity of the reservoir changes in accordance with deformation of the piezoelectric body so as to discharge lubricating oil from the oil feeding unit. The control apparatus includes N driving circuits 71a to 71n configured to apply voltages to the piezoelectric body (where N is an integer equal to or greater than two). The N driving circuits 71a to 71n are connected in parallel to the piezoelectric body. During oil feeding, the control apparatus uses a predetermined number of the driving circuits selected from the N driving circuits. The predetermined number is smaller than N.

This grease application device includes: a nozzle body that has a first end portion insertable into an inner spline portion, the inner spline portion being formed at an end portion of a workpiece; a nozzle that is formed on the first end portion of the nozzle body and discharges grease into a groove of the inner spline portion; a nozzle body shift portion that is connected to a second end portion of the nozzle body and that moves the nozzle body in a longitudinal direction, the second end portion being on an opposite side to the first end portion; a grease retention portion that retains the grease discharged from the nozzle; a grease pressure-feed portion that pressure-feeds the grease retained in the grease retention portion to the nozzle; and an operation portion that links an operation of causing the nozzle body shift portion to move the nozzle body from the first end portion toward the second end portion with an operation of causing the grease pressure-feed portion to discharge the grease from the nozzle.

This grease application device includes: a nozzle body that has a first end portion insertable into an inner spline portion, the inner spline portion being formed at an end portion of a workpiece; a nozzle that is formed on the first end portion of the nozzle body and discharges grease into a groove of the inner spline portion; a nozzle body shift portion that is connected to a second end portion of the nozzle body and that moves the nozzle body in a longitudinal direction, the second end portion being on an opposite side to the first end portion; a grease retention portion that retains the grease discharged from the nozzle; a grease pressure-feed portion that pressure-feeds the grease retained in the grease retention portion to the nozzle; and an operation portion that links an operation of causing the nozzle body shift portion to move the nozzle body from the first end portion toward the second end portion with an operation of causing the grease pressure-feed portion to discharge the grease from the nozzle.

A mobile agricultural machine includes a sensor capable of sensing a gaseous composition of an air flow impinging the sensor; an air filtering unit configured to remove particulate matter from the air flow; and a controller. The controller is configured to: receive a sensing signal from the sensor, wherein the sensing signal is representative of the gaseous composition; and output an indication signal if the gaseous composition is indicative of an anomaly associated with an operation of the mobile agricultural machine.

An oil circulation system is configured to supply lubrication oil to a plunger pump. The oil circulation system includes an oil tank, and the oil tank is provided with an electric heater. The oil circulation system further includes: a main circulation circuit. Two ends of the main circulation circuit are configured to respectively communicate with an oil outlet and an oil inlet of the oil tank, and the main circulation circuit is provided with a power member; and an overflow valve, disposed on the main circulation circuit and located on an oil outflow side of the power member.

An oil circulation system is configured to supply lubrication oil to a plunger pump. The oil circulation system includes an oil tank, and the oil tank is provided with an electric heater. The oil circulation system further includes: a main circulation circuit. Two ends of the main circulation circuit are configured to respectively communicate with an oil outlet and an oil inlet of the oil tank, and the main circulation circuit is provided with a power member; and an overflow valve, disposed on the main circulation circuit and located on an oil outflow side of the power member.